68878737 has 6 divisors (see below), whose sum is σ = 99491522. Its totient is φ = 45919152.

The previous prime is 68878727. The next prime is 68878751. The reversal of 68878737 is 73787886.

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 11861136 = 7551^2 + 3444^2 .

It is a de Polignac number, because none of the positive numbers 2^k-68878737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68878717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3826588 + ... + 3826605.

Almost surely, 2^68878737 is an apocalyptic number.

It is an amenable number.

68878737 is a deficient number, since it is larger than the sum of its proper divisors (30612785).

68878737 is a wasteful number, since it uses less digits than its factorization.

68878737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7653199 (or 7653196 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 68878737 is about 8299.3214782897. The cubic root of 68878737 is about 409.9161775895.

The spelling of 68878737 in words is "sixty-eight million, eight hundred seventy-eight thousand, seven hundred thirty-seven".